Bolt lock



'Aug. 14, 1956 A. N. MOLLOY BOLT LOCK Filed Nov. 12, 1954 United StatesPatent BOLT LOCK.

Arthur N. Molloy, 0akdale,.N. Y.

Application November 12, 1954,. Serial No. 468,191

1'Claim. Cl. 292-57 The present invention relates primarily to doorbolts and more particularly door bolts such as are frequently employedon screen doors and the like.

One of the primary objects of the present invention is to provide a boltfor doors, such as screen doors, that can at times be operated to boltand unbolt the door from either side thereof and at other times beoperated only from one side of the door, such as the inside.

Another object of the present invention is to provide a door bolt ofimproved design having the above feature that is reliable and positivein operation, and which is easily and readily installed and operated.

Another object of the present invention is to provide a door bolt unithaving a bolt with a pair of radially extending operating elements, oneon each side of the door, for slidably and rotatively operating the boltwith the bolt arranged for slidable movement only in a predeterminedrotatable position.

Still another object of the present invention is to provide a door boltthat is easy and cheap to manufacture.

The above and further objects and features of the present invention willbe more apparent in the following detailed description of the preferredembodiment thereof wherein reference is made to the accompanyingdrawings, in the latter of which:

Fig. 1 is a front view of the preferred embodiment of the inventionshowing the door bolt in an open or unlocked posit-ion attached to asection of a door and associated door frame;

Fig. 2 is a view similar to Fig. 1 showing the door bolt in an operatedor locked position;

Fig. 3 is a rear view of the door bolt of Fig. 2; and

Fig. 4 is a sectional view taken substantially on line 44 of Fig. 1.

Referring now to the drawings, a section of a door, such as a screen orstorm door, is represented by the reference numeral 11.

A flat plate 13 which may have beveled edges such as at 14 is attachedto the inside of the door 11 adjacent one side thereof by screws 16.Extending outward from the central section of the plate 13 is asemi-circular section 17. The sect-ion 17 may be pressed from thecentral section of the plate 13 or may be formed separately and securedto the plate by suitable means such as by welding.

The inside concave surface of the section 17 and parts of the face ofthe plate 13 form a housing for a horizontal bolt 18 of circularcross-section. As shown in Figs. 1 and 2, the bolt 18 extends somewhatbeyond the limits of the semi-circular section 17 and is slidabletherein within certain limits, as will presently be described.

The semi-circular section 17 has a pair of vertical slots or openings 19therein which are connected together adjacent the lower ends thereof bya horizontal slot or opening 21. An operating handle 22 extends radiallyfrom the bolt 18 and through the slots 19 or 21 on the bolt side of thedoor. Also extending radially from the 2 bolt18 and through an opening23 in the door to theoutside thereof is a second operating handle 24having a knob 26 in the free end thereof.

The opening 23 in the door may have a bushing 25 therein.

The operating handles 22 and- 24 are preferably on diametricallyopposite sides of the bolt 18 and bymeans of. the handles the bolt may,within limits, be rotated about the axis thereof and slid in thedirection of its length. It will be noted however that the bolt must berotated to substantially the position shown in Fig. 4 to bring theoperating handle 22 into alignment with the slot 21 before the bolt canbe moved longitudinally. Normally the weight of the operating handle 24and knob 26 are so much greater than that of the operating handle 22that with the bolt 18 in either its left or right hand position as shownin Figs. 1 and 2, respectively, the operating handle 24 rests in thebottom of the opening 23 and in this position the operating handle 22will be in either one or the other of the slots 19.

With the operating handle in either one of the slots 19 the bolt cannotslide and accordingly, the outside operating handle 24 must be raised orthe inside operating handle depressed before the bolt 18 can he slidfrom one position to the other. This is an important feature of thepresent invention as it prevents undesired movement of the bolt as issometimes the case when, for example, the door is slammed or jarred.

Mounted on the door frame 12 by screws 27 and in alignment with theplate 13 is an element 28 having a rounded bolt receiving section 29into which the bolt 18 may be slid with the door in a closed position tothereby bolt the door and prevent it from being opened.

When the door is bolted by sliding the right hand end of the bolt 18, asshown in Fig. 2, into the rounded section 29 of the element 28, and itis desired to prevent the door from being unbolted from the outside, asafety lever 31 is positioned to prevent movement of the bolt. Thesafety lever 31 is pivotally mounted at one end thereof on a pivot pin32 supported adjacent the outer end of a member 33 extending from theplate 13. Normally the safety lever 31 is in the position shown in Fig.1 where it is out of operative alignment with the bolt 18 and does nothinder movement thereof. However, with the bolt to the right, as shownin Fig. 2, and the safety lever 31 in its upper position, movement ofthe bolt 18 to the left is prevented. A spring clip 34 extending fromthe plate 13 holds the safety lever 31 in its operated or bolt blockingposition.

Since the safety lever 31 can be operated only from the inside of thedoor to unblock the bolt 18, the door when bolted and with the safetylever operated can not be opened from the outside. Thus, normally thebolt 18 can be operated to bolt and unbolt the door from both theoutside and inside of the door, and when desired the door may be boltedand arranged through the safety lever 31 for unbolting only from theinside of the door.

While the present invention has been shown and described in thepreferred embodiment thereof, it will be apparent that variousmodifications can be made therein without departing from the spirit oressential attributes thereof, and it is desired therefore that only suchlimitations be placed thereon as are imposed by the appended claim.

What is claimed is:

In a device of the type described for securing to one side of a door andcooperable with a frame attached member to lock the door and prevent itfrom being opened, said device including a slidable and rotatable boltfor engaging the frame attached member, a housing for said bolt and apair of operating handles, one of said handles extending through saiddoor to the front thereof and the other extending through said housing,vertical and horizontal slots in said housing and cooperating With saidlast named handle to limit movement of .said bolt, a safety leverpivotally attached to said device below the horizontal axial plane ofsaid bolt and 5 pivotable in a vertical plane at right angles to thesliding movement of said bolt, means including said safety lever withsaid bolt in a door locking position to prevent movement of said bolt toa door unlocking position,

a friction clip engageable with said safety lever and means 10 includingsaid friction clip for holding said safety lever in a bolt blockingposition.

References Cited in the file of this patent UNITED STATES PATENTS HartNov. 4, Parsons Dec. 13, Peel Jan. 23, Copping July 16, Gertsfeld Dec.8, Schlage May 3,

FOREIGN PATENTS Great Britain Oct. 8,

